History of hair and fiber analysis

One of the first papers on hair analysis was published in France in 1857. & by the early 1900's microscopic examination of hair was established and well used. A single hair holds information which can help us find out the race, sex, and the age of its owner, even though a fingerprint can hold more information a single strand of hair will do if that is all to be found. Hairs can be found anywhere: On the suspect, the victim, the crime scene, etc. Hair is composed of many many elements. But the most common are protein substances and keratin. Hairs absorbent property comes in handy with arsenic poisoning cases, because it is found in the hair. Examination of the roots can help let scientists know if the hair had fallen out or if it was forcefully removed. Scientists can find whether hair is human or animal, what race it is, what species of animal if animal hair, or what body part it came from. Fibers although let the scientists know what kind of clothing the suspect was wearing or has. Fibers which are synthetic must be identified with infrared spectrophotometry. Scientists can determine a fibre by the way it absorbs light. This is all i can find about hair and fibers.